This circuit, with 1 A output, was found in a 1975 documentation. The transistors admit equivalents and the transformer has windings according to the voltages being worked.
Found in an Electronics Now from the 90s, this circuit appears elsewhere in this section and...
This TTL circuit was found in the February 1973 issue of Radio Electronics magazine. The power...
This circuit was found in an old publication about transistor. The original trasistors are...